Here is what I did for building codeblocks against wx 3.2.0 library under 64bit Windows.
I just replace all the text in the *wx31_64.cbp files
<Variable name="WX_VERSION" value="31" />
to
<Variable name="WX_VERSION" value="32" />
Then, I just build the CodeBlocks_wx31_64.workspace as I did before against wx 3.1.7 library.
:)